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// Date input
DateInput = (function($) { // Localise the $ function

    DateInput.DEFAULT_OPTS = {
        month_names: ["一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"],
        short_month_names: ["一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二"],
        short_day_names: ["一", "二", "三", "四", "五", "六", "日"],
        
        start_of_week: 0
    };

    function DateInput(e,t){typeof t!="object"&&(t={}),$.extend(this,DateInput.DEFAULT_OPTS,t),this.input=$(e),this.bindMethodsToObj("show","hide","hideIfClickOutside","keydownHandler","selectDate"),this.build(),this.selectDate(),this.hide()}DateInput.prototype={build:function(){var e=$('<p class="month_nav"><span class="buttonx prev" title="[Page-Up]">&#171;</span> <span class="month_name"></span> <span class="buttonx next" title="[Page-Down]">&#187;</span></p>');this.monthNameSpan=$(".month_name",e),$(".prev",e).click(this.bindToObj(function(){this.moveMonthBy(-1)})),$(".next",e).click(this.bindToObj(function(){this.moveMonthBy(1)}));var t=$('<p class="year_nav"><span class="buttonx prev" title="[Ctrl+Page-Up]">&#171;</span> <span class="year_name"></span> <span class="buttonx next" title="[Ctrl+Page-Down]">&#187;</span></p>');this.yearNameSpan=$(".year_name",t),$(".prev",t).click(this.bindToObj(function(){this.moveMonthBy(-12)})),$(".next",t).click(this.bindToObj(function(){this.moveMonthBy(12)}));var n=$('<div class="nav"></div>').append(e,t),r="<table><thead><tr>";$(this.adjustDays(this.short_day_names)).each(function(){r+="<th>"+this+"</th>"}),r+="</tr></thead><tbody></tbody></table>",this.dateSelector=this.rootLayers=$('<div class="date_selector"></div>').append(n,r).insertAfter(this.input),/MSIE 6/.test(navigator.userAgent)&&(this.ieframe=$('<iframe class="date_selector_ieframe" frameborder="0" src="#"></iframe>').insertBefore(this.dateSelector),this.rootLayers=this.rootLayers.add(this.ieframe),$(".buttonx",n).mouseover(function(){$(this).addClass("hover")}),$(".buttonx",n).mouseout(function(){$(this).removeClass("hover")})),this.tbody=$("tbody",this.dateSelector),this.input.change(this.bindToObj(function(){this.selectDate()})),this.selectDate()},selectMonth:function(e){var t=new Date(e.getFullYear(),e.getMonth(),1);if(!this.currentMonth||this.currentMonth.getFullYear()!=t.getFullYear()||this.currentMonth.getMonth()!=t.getMonth()){this.currentMonth=t;var n=this.rangeStart(e),r=this.rangeEnd(e),i=this.daysBetween(n,r),s="";for(var o=0;o<=i;o++){var u=new Date(n.getFullYear(),n.getMonth(),n.getDate()+o,12,0);this.isFirstDayOfWeek(u)&&(s+="<tr>"),u.getMonth()==e.getMonth()?s+='<td class="selectable_day" date="'+this.dateToString(u)+'">'+u.getDate()+"</td>":s+='<td class="unselected_month" date="'+this.dateToString(u)+'">'+u.getDate()+"</td>",this.isLastDayOfWeek(u)&&(s+="</tr>")}this.tbody.empty().append(s),this.monthNameSpan.empty().append(this.monthName(e)),this.yearNameSpan.empty().append(this.currentMonth.getFullYear()),$(".selectable_day",this.tbody).click(this.bindToObj(function(e){this.changeInput($(e.target).attr("date"))})),$("td[date='"+this.dateToString(new Date)+"']",this.tbody).addClass("today"),$("td.selectable_day",this.tbody).mouseover(function(){$(this).addClass("hover")}),$("td.selectable_day",this.tbody).mouseout(function(){$(this).removeClass("hover")})}$(".selected",this.tbody).removeClass("selected"),$('td[date="'+this.selectedDateString+'"]',this.tbody).addClass("selected")},selectDate:function(e){typeof e=="undefined"&&(e=this.stringToDate(this.input.val())),e||(e=new Date),this.selectedDate=e,this.selectedDateString=this.dateToString(this.selectedDate),this.selectMonth(this.selectedDate)},changeInput:function(e){this.input.val(e).change(),this.hide()},show:function(){this.rootLayers.css("display","block"),$([window,document.body]).click(this.hideIfClickOutside),this.input.unbind("focus",this.show),$(document.body).keydown(this.keydownHandler),this.setPosition()},hide:function(){this.rootLayers.css("display","none"),$([window,document.body]).unbind("click",this.hideIfClickOutside),this.input.focus(this.show),$(document.body).unbind("keydown",this.keydownHandler)},hideIfClickOutside:function(e){e.target!=this.input[0]&&!this.insideSelector(e)&&this.hide()},insideSelector:function(e){var t=$(e.target);if(t.closest(".date_selector").length==1)return!0},keydownHandler:function(e){switch(e.keyCode){case 9:case 27:this.hide();return;case 13:this.changeInput(this.selectedDateString);break;case 33:this.moveDateMonthBy(e.ctrlKey?-12:-1);break;case 34:this.moveDateMonthBy(e.ctrlKey?12:1);break;case 38:this.moveDateBy(-7);break;case 40:this.moveDateBy(7);break;case 37:this.moveDateBy(-1);break;case 39:this.moveDateBy(1);break;default:return}e.preventDefault()},stringToDate:function(e){var t;return(t=e.match(/^(\d{1,2}) ([^\s]+) (\d{4,4})$/))?new Date(t[3],this.shortMonthNum(t[2]),t[1],12,0):null},dateToString:function(e){var t=(e.getMonth()+1).toString(),n=e.getDate().toString();return t.length==1&&(t="0"+t),n.length==1&&(n="0"+n),e.getFullYear()+"-"+t+"-"+n},setPosition:function(){var e=this.input.offset();this.rootLayers.css({top:this.input.outerHeight()}),this.ieframe&&this.ieframe.css({width:this.dateSelector.outerWidth(),height:this.dateSelector.outerHeight()})},moveDateBy:function(e){var t=new Date(this.selectedDate.getFullYear(),this.selectedDate.getMonth(),this.selectedDate.getDate()+e);this.selectDate(t)},moveDateMonthBy:function(e){var t=new Date(this.selectedDate.getFullYear(),this.selectedDate.getMonth()+e,this.selectedDate.getDate());t.getMonth()==this.selectedDate.getMonth()+e+1&&t.setDate(0),this.selectDate(t)},moveMonthBy:function(e){var t=new Date(this.currentMonth.getFullYear(),this.currentMonth.getMonth()+e,this.currentMonth.getDate());this.selectMonth(t)},monthName:function(e){return this.month_names[e.getMonth()]},bindToObj:function(e){var t=this;return function(){return e.apply(t,arguments)}},bindMethodsToObj:function(){for(var e=0;e<arguments.length;e++)this[arguments[e]]=this.bindToObj(this[arguments[e]])},indexFor:function(e,t){for(var n=0;n<e.length;n++)if(t==e[n])return n},monthNum:function(e){return this.indexFor(this.month_names,e)},shortMonthNum:function(e){return this.indexFor(this.short_month_names,e)},shortDayNum:function(e){return this.indexFor(this.short_day_names,e)},daysBetween:function(e,t){return e=Date.UTC(e.getFullYear(),e.getMonth(),e.getDate()),t=Date.UTC(t.getFullYear(),t.getMonth(),t.getDate()),(t-e)/864e5},changeDayTo:function(e,t,n){var r=n*(Math.abs(t.getDay()-e-n*7)%7);return new Date(t.getFullYear(),t.getMonth(),t.getDate()+r)},rangeStart:function(e){return this.changeDayTo(this.start_of_week,new Date(e.getFullYear(),e.getMonth()),-1)},rangeEnd:function(e){return this.changeDayTo((this.start_of_week-1)%7,new Date(e.getFullYear(),e.getMonth()+1,0),1)},isFirstDayOfWeek:function(e){return e.getDay()==this.start_of_week},isLastDayOfWeek:function(e){return e.getDay()==(this.start_of_week-1)%7},adjustDays:function(e){var t=[];for(var n=0;n<e.length;n++)t[n]=e[(n+this.start_of_week)%7];return t}},$.fn.date_input=function(e){return this.each(function(){new DateInput(this,e)})},$.date_input={initialize:function(e){$("input.date_input").date_input(e)}}

    return DateInput;
})(jQuery); // End localisation of the $ function